'Dropbox is an easy to use cloud storage solution' .... and its free.
You simply sign up and install Dropbox on your computers, phones and tablets, then any files you add to your Dropbox folder will be synced across all of your other devices ... Simple.
You can then create folders and allow other people to share those folders making this a great way to transfer large files that may be too large to email.
Dropbox supports, Linus, Blackberry, Windows, Mac os, iOS and Android.
Dropbox is free and available here dropbox.com
There are also various apps available to supercharge your Dropbox account; see '25 Apps for Dropbox' for more information.